Improvement in cans for transporting nitro-glycerine



A. HAMALR.

Cans for Transporting Nitrn-Glyceri ne, 81.0. I

Patentd April 1, 1873.

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a c/amy AM, PHOmiffHOGRAFH/C (:0. IV. Xq'ossom/ds mucsss) UNITED STATESPATENT OFFICE.

ALEXANDER HAMAR, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN CANS FOR TRANSPCRTING NlTRO-GLYCERINE, &c.

Specification forming part of Letters Patent No. 137,439, dated April 1,1873; application filed March 22, 1873.

To all whom it may concern:

Be it known that I, ALEXANDER HAMAR, of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented certain new andusefullmprovements in Safety- Oans for Transporting Explosive Materials,of which the following is a specification This invention has for itsobject to furnish a can for transportingand storing nitro-glycerine andsimilar explosive materials, which efl'ectually prevents the accidentalexplosion of the contents. The invention consists in providing a canpossessing the usual filling and discharge tube and other necessaryappendages with a tube or vent for permitting the escape of the gasesgenerated Within the can, thus counteracting this chief cause ofaccidental explosion; said gas-tube being provided with one or morefunnel-shaped diaphragms suitably perforated for the passage of thegases, but so arranged as to prevent the escape of the contents in theevent of the can being capsized.

1n the drawing, the figure represents a vertical section of my improvedcan for containing nitro-glycerine and other explosive fluids.

The outer or surrounding casing A, inclosin g can B for the reception ofnitroglycerine or similar explosive materials, is so arranged in respectto the latter as to leave a space or chamber, which is filled withplaster of Paris or other suitable non-conducting material. The usualfilling and discharge tube 0 or nozzle of the can projects through thetop of the casing, and is provided with a tightly-fitting stopper orequivalent device for closing the same. In order to furnish means forpermitting the escape of the gases generated or evolved by thedecomposition of the nitro-glycerine in the can B, I provide the samewith a tube or duct, E, projecting through the casing A, and providedwith one or more funnel-shaped diaphragms, F, which are perforated oropen at their lower ends for the passage of the gases, and so arrangedin relation to the inner diameter of the tube as to prevent the escapeof the contents of the can in case the same is overturned, all thecontents entering the tube being detained either by the lower or upperfunnels, and conducted back again into the can when the same is in anupright position.

The provision of a vent for the escape of the gases effectuallyovercomes the chief cause of all accidental explosions which aresuperinduced when no such provision is made through the sudden relief ofpressure, either by the forcible ejection of the stopper, due to thepressure of the gases, or when the stopper is removed for the purpose ofdischarging the contents of the can.

Having thus fully described nay-invention, what I claim is A oan'for thetransportation of nitro-glycerine or similar explosive materials,provided with a discharge-nozzle, and with a vent-tube having one ormore funnel-shaped diaphragms for the escape of gases created within thecan, substantially as described, for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this22d day of March, 1873. A. HAMAR.

Witnesses:

JAMES L. NoRRIs, WM. J. PEYTON.

